Option-1
We would see DHCP-Options Profiles configured under Objects if we create it using Template-Workflows.
Option-2
If you are using a Device template and would like to only have the DHCP Options profile referred to the DHCP-Server in that specific Device-Template, you could call it under DHCP > Server > Options-Profile.
The idea of using Config > Objects > DHCP Options Profiles
(vs)
Creating a profile under the Networking > DHCP
Is the flexibility to refer this DHCP options profile across various workflow templates when configured under Objects, instead of limiting it to a per Device or Service template under Configuration, when creating the DHCP Options profile at the Networking > DHCP > Options profile.